WO2016159608A1

WO2016159608A1 - Light-emitting film

Info

Publication number: WO2016159608A1
Application number: PCT/KR2016/003123
Authority: WO
Inventors: 이성민; 유수영; 김선국; 박문수; 윤혁; 권태균
Original assignee: 주식회사 엘지화학
Priority date: 2015-03-27
Filing date: 2016-03-28
Publication date: 2016-10-06
Also published as: CN107637174A; CN107637174B; US20180113361A1; KR20160115851A; US10386674B2; KR101748991B1

Abstract

The present application relates to a light-emitting film, an illumination device, and a display device. The present application may provide a light-emitting film and the use thereof, the light-emitting film being capable of effectively generating a desired light, such as white light, and stably maintaining the performance thereof for a long period of time.

Description

Light emitting film

This application claims the benefit of priority based on Korean Patent Application No. 10-2015-0043449 filed March 27, 2015 and Korean Patent Application No. 10-2015-0045633 filed March 31, 2015, All contents disclosed in the documents of the corresponding Korean patent application are included as part of this specification.

The present application relates to a light emitting film, a lighting device and a display device.

Lighting devices are used for a variety of applications. The lighting device is, for example, a BLU of a display such as a liquid crystal display (LCD), a TV, a computer, a mobile phone, a smartphone, a personal digital assistant (PDA), a gaming device, an electronic reading device or a digital camera. Can be used as (Backlight Unit). In addition, the lighting device may be used for indoor or outdoor lighting, stage lighting, decorative lighting, accent lighting or museum lighting, and the like, and may also be used for special wavelength lighting required in horticulture or biology.

As a typical lighting device, for example, a device that emits white light by combining a blue LED (Light Emitting Diode) and a phosphor such as YAG (Yttrium aluminum garnet), which is used as a BLU of an LCD.

(Patent Document 1) Korean Patent Publication No. 2011-0048397

(Patent Document 2) Korean Patent Publication No. 2011-0038191

The present application provides a light emitting film, a lighting device and a display device. The present application can provide a light emitting film and its use, which can effectively produce a desired light, for example, white light, and whose performance can be stably maintained for a long time.

The present application relates to a light emitting film. In the present application, the term light emitting film may refer to a film formed to emit light. For example, the light emitting film may be a film formed to absorb light having a predetermined wavelength and emit light having the same or different wavelength as the absorbed light.

The light emitting film may include a light emitting layer. The light emitting layer may include, for example, light emitting nanoparticles and a binder holding the light emitting nanoparticles.

In the present application, the term light emitting nanoparticles may refer to nanoparticles capable of emitting light. For example, the light emitting nanoparticles may refer to nanoparticles formed to absorb light having a predetermined wavelength and emit light having the same or different wavelength as the absorbed light. In the present application, the term nanoparticle is a particle having a dimension of a nano scale, for example, an average particle diameter of about 100 nm or less, 90 nm or less, 80 nm or less, 70 nm or less, 60 nm or less, 50 nm or less , 40 nm or less, 30 nm or less, 20 nm or less, or about 15 nm or less. The shape of the nanoparticles is not particularly limited, and may be spherical, ellipsoidal, polygonal or amorphous.

Although referred to herein as nanoparticles for convenience, the nanostructures may be in the form of particles, for example, nanowires, nanorods, nanotubes, branched nanostructures, nanonotetrapods, tripods. Or bipods, and the like, and these forms may also be included in the nanoparticles defined in the present application. In the present application, the term nanostructures includes similar structures having at least one area or characteristic dimension having dimensions of less than about 500 nm, less than about 200 nm, less than about 100 nm, less than about 50 nm, less than about 20 nm or less than about 10 nm. It may include structures. In general, area or characteristic dimensions may exist along the smallest axis of the structure, but are not limited thereto.

For example, the light emitting nanoparticles may be referred to as nanoparticles (hereinafter, referred to as green particles) capable of absorbing light of any wavelength within a range of 420 to 490 nm to emit light of any wavelength within a range of 490 to 580 nm. .) And / or nanoparticles (hereinafter referred to as red particles) capable of absorbing light of any wavelength within the range of 450-490 nm to emit light of any wavelength within the range of 580-780 nm. Can be. For example, in order to obtain a light emitting film capable of emitting white light, the red particles and the green particles may be included in the light emitting layer together at an appropriate ratio. In one example, the light emitting layer of the light emitting film capable of emitting white light may include 300 to 1500 parts by weight of green particles relative to 100 parts by weight of the red particles. The light emitting nanoparticles can be used without any particular limitation as long as they exhibit such a function. As a representative example of such nanoparticles, a nanostructure called a quantum dot may be exemplified.

The nanostructures can be, for example, substantially crystalline, substantially monocrystalline, polycrystalline or amorphous, or combinations of the above.

Quantum dots that can be used as luminescent nanoparticles can be prepared in any known manner. For example, suitable methods for forming quantum dots are described in US Pat. No. 6,225,198, US Patent Publication 2002-0066401, US Pat. No. 6,207,229, US Pat. No. 6,322,901, US Pat. No. 6,949,206, US Pat. No. 7,572,393. , US Pat. No. 7,267,865, US Pat. No. 7,374,807 or US Pat. No. 6,861,155, and the like, and various other known methods may be applied to the present application.

Quantum dots or other nanoparticles of the present application can be formed using any suitable material, for example, an inorganic conductive or semiconducting material, as an inorganic material. Suitable semiconductor materials can be exemplified by Group II-VI, III-V, IV-VI and Group IV semiconductors. Specifically, Si, Ge, Sn, Se, Te, B, C (including diamond), P, BN, BP, BAs, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, InAs, InSb, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, ZnO, ZnS, ZnSe, ZnTe, CdS, CdSe, CdSeZn, CdTe, HgS, HgSe, HgTe, BeS, BeSe, BeTe, Mg MgSe, GeS, GeSe, GeTe, SnS, SnSe, SnTe, PbO, PbS, PbSe, PbTe, CuF, CuCl, CuBr, CuI, Si3N4, Ge3N4, Al2O3, (Al, Ga, In) 2 (S, Se, Te ), Al 2 CO and suitable combinations of two or more of the above semiconductors may be exemplified, but are not limited thereto.

In one example, the semiconductor nanocrystal or other nanostructure may include a dopant, such as a p-type dopant or an n-type dopant. Nanoparticles that may be used in the present application may also include II-VI or III-V semiconductors. Examples of II-VI or III-V semiconductor nanocrystals and nanostructures include any combination of periodic table group elements, such as Zn, Cd, and Hg, with periodic table group VI elements, such as S, Se, Te, Po, and the like; And any combination of group III elements, such as B, Al, Ga, In, and Tl, and group V elements, such as N, P, As, Sb, Bi, and the like, but is not limited thereto. In other examples suitable inorganic nanostructures include metal nanostructures, and suitable metals include Ru, Pd, Pt, Ni, W, Ta, Co, Mo, Ir, Re, Rh, Hf, Nb, Au, Ag, Ti , Sn, Zn, Fe or FePt and the like can be exemplified, but is not limited thereto.

The light emitting nanoparticles, for example quantum dots, may have a core-shell structure. Exemplary materials capable of forming core-cell structured luminescent nanoparticles include Si, Ge, Sn, Se, Te, B, C (including diamond), P, Co, Au, BN, BP, BAs, AlN, AlP , AlAs, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, InAs, InSb, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, ZnO, ZnS, ZnSe, ZnTe, CdS, CdSe, CdSeZn , CdTe, HgS, HgSe, HgTe, BeS, BeSe, BeTe, MgS, MgSe, GeS, GeSe, GeTe, SnS, SnSe, SnTe, PbO, PbS, PbSe, PbTe, CuF, CuCl, CuBr, CuI, Si3N4, Ge3N4 , Al 2 O 3, (Al, Ga, In) 2 (S, Se, Te) 3, Al 2 CO and any combination of two or more such materials are included, but are not limited to these. Exemplary core-cell luminescent nanoparticles (core / cell) applicable in this application include, but are not limited to, CdSe / ZnS, InP / ZnS, PbSe / PbS, CdSe / CdS, CdTe / CdS or CdTe / ZnS, etc. It is not.

The specific kind of light emitting nanoparticles is not particularly limited and may be appropriately selected in consideration of desired light emission characteristics.

In one example, luminescent nanoparticles, such as quantum dots, may be surrounded by one or more ligands or barriers. The ligand or barrier may be advantageous for improving the stability of the light emitting nanoparticles such as quantum dots and protecting the light emitting nanoparticles from harmful external conditions including high temperature, high intensity, external gas or moisture, and the like. In addition, as will be described later, the light emitting nanoparticles may exist only in any one of the matrix and emulsion regions, and in order to obtain such a light emitting layer, the characteristics of the ligand or barrier are compatible only with any one of the matrix and emulsion regions. It may be selected to have.

In one example, luminescent nanoparticles, such as quantum dots, can include ligands conjugated, cooperative, associated, or attached to their surface. Ligands and methods for forming the same are known in the art that can exhibit suitable properties on the surface of light emitting nanoparticles, such as quantum dots, and such methods can be applied without limitation in the present application. Such materials or methods are described, for example, in US Patent Publication No. 2008-0281010, US Publication No. 2008-0237540, US Publication No. 2010-0110728, US Publication No. 2008-0118755, US Patent No. 7,645,397 US Pat. No. 7,374,807, US Pat. No. 6,949,206, US Pat. No. 7,572,393, US Pat. No. 7,267,875, and the like, but are not limited thereto. In one example, the ligand may be a molecule having an amine group (oleylamine, triethylamine, hexylamine, naphtylamine, etc.) or a polymer, a molecule having a carboxyl group (oleic acid, etc.) or a polymer, a molecule having a thiol group (butanethiol, hexanethiol, dodecanethiol, etc.) or Polymer, molecule having pyridine group (pyridine etc.) or polymer, molecule having phosphine group (triphenylphosphine etc.), molecule having phosphine group (trioctylphosphine oxide etc.), molecule having carbonyl group (alkyl ketone etc.), benzene ring It may be formed by a molecule (benzene, styrene, etc.) or a polymer, a molecule having a hydroxyl group (butanol, hexanol, etc.) or a polymer.

The ratio of the light emitting nanoparticles in the light emitting layer is not particularly limited. For example, the light emitting nanoparticles may be selected in an appropriate range in consideration of desired optical properties. In one example, the light emitting nanoparticles in the light emitting layer may be present in a concentration of about 0.05 to 20% by weight, 0.05 to 15% by weight, 0.1 to 15% by weight or 0.5 to 15% by weight, but is not limited thereto.

In one example, the binder holding the light emitting nanoparticles may include two regions separated from each other. In the present application, the term phase-separated regions are regions formed by two regions that do not mix with each other, such as, for example, relatively hydrophobic regions and relatively hydrophilic regions, and are separated from each other. It may mean areas formed. Hereinafter, for convenience of description, any one of two regions separated from the phase of the binder may be referred to as a first region, and another region may be referred to as a second region. When the binder is in the form of an emulsion described below, one of the first and second regions may be a continuous phase, and the other region may be a dispersed phase.

The first region may be a hydrophilic region and the second region may be a hydrophobic region among the first region and the second region. In the present application, the hydrophilicity and hydrophobicity that distinguish the first and second regions are relative concepts, and the absolute criteria of hydrophilicity and hydrophobicity are particularly limited as long as it can be confirmed that the two regions are separated from each other in the light emitting layer. It doesn't happen.

The ratio of the hydrophilic first region to the hydrophobic second region may include, for example, the ratio of luminescent nanoparticles, adhesion with other layers such as a barrier film, formation efficiency of a phase separation structure, or physical properties required for film formation. You can choose by considering. For example, the light emitting layer may include 10 parts by weight to 100 parts by weight of the second area relative to 100 parts by weight of the first area. In another example, the emission layer may include 50 to 95 parts by weight of the first region and 5 to 50 parts by weight of the second region. Alternatively, the light emitting layer may include 50 to 95 parts by weight of the second region and 5 to 50 parts by weight of the first region. The term weight part in the present application means a weight ratio between components, unless otherwise specified. In addition, in the above, the ratio of the weight of the first and second regions is the ratio of the weight of each region itself; The ratio of the sum of the weights of all components included in each region; It may mean the ratio of the weight of the components included as the main component of each region or the ratio of the weight of the material used to form the respective regions. For example, the light emitting layer may be formed by mixing and polymerizing a hydrophilic polymerizable composition and a relatively hydrophobic polymerizable composition as described below. In this case, the ratio of the weight of each of the regions is determined by It may mean the ratio of the weight of the composition or the ratio of the weight between the hydrophilic polymerizable compound and the hydrophobic polymerizable compound which is the main component included in each composition. The hydrophilic polymerizable composition may mean a composition including a hydrophilic polymerizable compound as a main component, and the hydrophobic polymerizable composition may mean a composition including a hydrophobic polymerizable compound as a main component. The kind of the polymerizable compound in the above is not particularly limited, and may be, for example, a radical polymerizable compound. Included as the main component in the present application, the ratio of the weight of the component included as the main component based on the total weight is at least 55% by weight, at least 60% by weight, at least 65% by weight, at least 70% by weight, at least 75% by weight, 80 It may mean when the weight percent or more, 85 weight% or more, or 95 weight% or more. In the present application, the criteria for distinguishing hydrophilicity and hydrophobicity between the hydrophilic polymerizable compound and the hydrophobic polymerizable compound form, for example, the aforementioned phase-separated regions when the two compounds are relatively hydrophilic or hydrophobic and mixed with each other. It is not particularly limited as long as it can be done. In one example, the separation of hydrophilicity and hydrophobicity may be performed by so-called solubility parameters. The solubility parameter in the present application means a solubility parameter of a homopolymer formed by polymerization of the polymerizable compound, and through this, the degree of hydrophilicity and hydrophobicity of the compound can be determined. The manner of obtaining the solubility parameter is not particularly limited and may be in accordance with methods known in the art. For example, the parameter may be calculated or obtained according to a method known as a Hansen solubility parameter (HSP). Although not particularly limited, in the present application, the hydrophobic polymerizable compound may mean a polymerizable compound capable of forming a polymer having a solubility parameter of less than about 10 (cal / cm ³ ) ^{1/2 by} polymerization, and may be hydrophilic. The polymerizable compound may mean a polymerizable compound capable of forming a polymer having the above parameter by about 10 (cal / cm ³ ) ^1/2 or more by polymerization. The solubility parameter of the polymer formed by the hydrophobic polymerizable compound is, in another example, 3 (cal / cm ³ ) ^1/2 or more, 4 (cal / cm ³ ) ^1/2 or more or about 5 (cal / cm ³ ) ^{1 / It} may be ^{two or} more. The solubility parameter of the polymer formed by the hydrophilic polymerizable compound is, in another example, about 11 (cal / cm ³ ) ^1/2 or more, 12 (cal / cm ³ ) ^1/2 or more, 13 (cal / cm ³ ) ^{1 / 2} or more, 14 (cal / cm ³ ) ^1/2 or more, or 15 (cal / cm ³ ) ^{1/2 or} more. The solubility parameter of the polymer formed by the hydrophilic polymerizable compound is, in another example, about 40 (cal / cm ³ ) ^1/2 or less, about 35 (cal / cm ³ ) ^1/2 or less or about 30 (cal / cm ³ ). ^It may be ^1/2 or less. Differences in the solubility parameters of the hydrophobic and hydrophilic compounds can be controlled to achieve proper phase separation or emulsion structures. In one example, the difference in solubility parameters of the hydrophilic and hydrophobic polymerizable compounds or the polymer formed by each of them may be 5 (cal / cm ³ ) ^1/2 or more, 6 (cal / cm ³ ) ^1/2 or more, 7 (cal / cm ³ ) ^1/2 or more, or about 8 (cal / cm ³ ) ^{1/2 or} more. The difference is the value of the solubility parameter minus the small value. The upper limit of the difference is not particularly limited. The greater the difference in solubility parameters, the more suitable phase separation or emulsion structures can be formed. The upper limit of the difference may be, for example, 30 (cal / cm ³ ) ^1/2 or less, 25 (cal / cm ³ ) ^1/2 or less, or about 20 (cal / cm ³ ) ^1/2 or less. In the case where any of the physical properties described herein is a physical property that changes with temperature, the physical property may mean physical properties at room temperature. As used herein, the term room temperature is a natural temperature that is not heated or reduced, and may mean, for example, any temperature in the range of about 10 ° C to 30 ° C, about 23 ° C, or about 25 ° C.

In one example, the light emitting layer or the binder may be an emulsion type layer. Meanwhile, in the present application, a layer in the form of an emulsion is any one of two or more phases (for example, the first and second regions) which are not mixed with each other, and a continuous phase in the layer. ) And the other region may refer to a layer having a form dispersed in the continuous phase to form a dispersed phase. In the above, the continuous phase and the dispersed phase may be solid, semi-solid or liquid phase, respectively, and may be the same phase or different phases. Generally, emulsion is a term mainly used for two or more liquid phases which are not mixed with each other, but the term emulsion in the present application does not necessarily mean an emulsion formed by two or more liquid phases.

In one example, the light emitting layer may include a matrix forming the continuous phase, and may include an emulsion region that is a dispersed phase dispersed in the matrix. Wherein the matrix is any one of the above-described first and second regions (eg, the first region), and the emulsion region, which is a dispersed phase, is the other of the first and second regions (eg, the second region). Area).

The emulsion region may be in the form of particles. That is, the emulsion region may be dispersed in the matrix in the form of particles. In this case, the particle shape of the emulsion region is not particularly limited and may be approximately spherical, ellipsoidal, polygonal or amorphous. The average diameter of the particle form may be in the range of about 1 μm to 200 μm, in the range of about 1 μm to 50 μm or in the range of about 50 μm to 200 μm. The size of the particle form can be controlled by adjusting the proportion of materials forming the matrix and emulsion regions, or by using a surfactant or the like.

The ratio of matrix and emulsion regions in the emissive layer is For example, the composition may be selected in consideration of the ratio of light-emitting nanoparticles to be included in the light emitting layer, adhesion to other layers such as a barrier film and a barrier film, generation efficiency of an emulsion structure that is a phase-separated structure, or physical properties required for film formation. Can be. For example, the light emitting layer may include 5 to 40 parts by weight of the emulsion region relative to 100 parts by weight of the matrix. The proportion of the emulsion region may be at least 10 parts by weight or at least 15 parts by weight with respect to 100 parts by weight of the matrix. The ratio of the emulsion region may be 35 parts by weight or less with respect to 100 parts by weight of the matrix. In the above, the ratio of the weight of the matrix and the emulsion region is the ratio of the weight of each region itself, or the sum of the weights of all the components included in the region or the ratio of the main components or the weight of the material used to form the respective regions. It can mean a ratio. For example, the matrix and the emulsion region may each include polymerized units of hydrophilic and hydrophobic polymerizable compounds, and the weight ratio may be a ratio between the polymerized units.

The light emitting nanoparticles included in the light emitting layer may be included in the matrix or emulsion region. In one example, the light emitting nanoparticles may be included in only one of the matrix and emulsion regions, and may not be substantially included in the other regions. In the present application, the fact that the light emitting nanoparticles are not substantially included in any region is, for example, based on the total weight of the light emitting nanoparticles included in the light emitting layer, the weight ratio of the light emitting nanoparticles included in the region is 10. It will mean the following:% or less, 9% or less, 8% or less, 7% or less, 6% or less, 5% or less, 4% or less, 3% or less, 2% or less, 1% or less, 0.5% or less, or 0.1% or less. Can be.

The light emitting nanoparticles may be included in the emulsion region substantially among the matrix and emulsion regions. In this case, the matrix may be substantially free of light emitting nanoparticles. Therefore, in the above case, the ratio of the light emitting nanoparticles included in the emulsion region is 90% by weight, 91% by weight, 92% by weight, 93% by weight based on the total weight of the light emitting nanoparticles included in the light emitting layer. Or at least 94% by weight, at least 95% by weight, at least 96% by weight, at least 97% by weight, at least 98% by weight, at least 99% by weight, at least 99.5% by weight or at least 99.9% by weight.

Forming two phase-separated regions in the light emitting layer and substantially positioning the light emitting nanoparticles in only one of the two regions ensures physical properties suitable for filming, and the other layers such as a blocking film described later and the It is advantageous to secure adhesion between the light emitting layers, and more effectively controls other factors that may adversely affect the physical properties of the nanoparticles, such as an initiator or a crosslinking agent, in the region where the light emitting nanoparticles exist when the light emitting film is formed. Can be formed.

Any one of the matrix and emulsion regions may comprise a hydrophilic polymer and the other region may comprise a hydrophobic polymer. As described above, the hydrophilic polymer refers to a polymer having a HSP (Hansen solubility parameter) of 10 (cal / cm ³ ) ^1/2 or more, and the hydrophobic polymer refers to a polymer having an HSP of less than 10 (cal / cm ³ ) ^1/2 . Can mean. In another example, the solubility parameter of the hydrophobic polymer may be 3 (cal / cm ³ ) ^1/2 or more, 4 (cal / cm ³ ) ^1/2 or more, or about 5 (cal / cm ³ ) ^{1/2 or} more. The solubility parameter of the hydrophilic polymer is, in another example, about 11 (cal / cm ³ ) ^1/2 or more, 12 (cal / cm ³ ) ^1/2 or more, 13 (cal / cm ³ ) ^1/2 or more, 14 (cal / cm ³ ) ^1/2 or more or 15 (cal / cm ³ ) ^{1/2 or} more. In another example, the solubility parameter of the hydrophilic polymer may be about 40 (cal / cm ³ ) ^1/2 or less, about 35 (cal / cm ³ ) ^1/2 or less, or about 30 (cal / cm ³ ) ^1/2 or less. . Differences in the solubility parameters of the hydrophobic and hydrophilic polymers can be controlled to implement an appropriate phase separation structure or emulsion structure. In one example, the difference between the solubility parameters of the hydrophilic and hydrophobic polymer is 5 (cal / cm ³ ) ^1/2 or more, 6 (cal / cm ³ ) ^1/2 or more, 7 (cal / cm ³ ) ^1/2 or more Or about 8 (cal / cm ³ ) ^{1/2 or} more. The difference is the value of the solubility parameter minus the small value. The upper limit of the difference is not particularly limited. The greater the difference in solubility parameters, the more suitable phase separation or emulsion structures can be formed. The upper limit of the difference may be, for example, 30 (cal / cm ³ ) ^1/2 or less, 25 (cal / cm ³ ) ^1/2 or less, or about 20 (cal / cm ³ ) ^1/2 or less. In one example, the matrix may comprise a hydrophilic polymer, and the emulsion region may comprise a hydrophobic polymer.

The matrix can be formed by polymerizing the hydrophilic polymerizable compound, for example, a hydrophilic radical polymerizable compound. In this case the matrix comprises a compound of formula 1, a compound of formula 2, a compound of formula 3, a compound of formula 4, a nitrogen containing radically polymerizable compound, an acrylic acid, methacrylic acid or a salt site The polymerization unit of the radically polymerizable compound may be included. In the present application, the term polymerized unit of a predetermined compound may mean a unit formed by polymerization of the predetermined compound.

[Formula 1]

In the formula (1), Q is hydrogen or an alkyl group, U is an alkylene group, Z is a hydrogen, alkoxy group, an epoxy group or a monovalent hydrocarbon group, and m is any number.

[Formula 2]

In formula (2), Q is hydrogen or an alkyl group, U is an alkylene group, and m is any number.

[Formula 3]

In Formula 3, Q is hydrogen or an alkyl group, A is an alkylene group which may be substituted with a hydroxy group, and U is an alkylene group.

[Formula 4]

In Formula 4, Q is hydrogen or an alkyl group, A and U are each independently an alkylene group, and X is a hydroxy group or cyano group.

In the present application, the term "alkylene group" may mean an alkylene group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms, unless otherwise specified. The alkylene group may be linear, branched or cyclic. In addition, the alkylene group may be optionally substituted with one or more substituents.

In the present application, the term "epoxy group", unless otherwise specified, may mean a cyclic ether having three ring constituent atoms or a compound containing the cyclic ether or a monovalent moiety derived therefrom. have. Examples of the epoxy group include glycidyl group, epoxyalkyl group, glycidoxyalkyl group or alicyclic epoxy group. In the above, the alicyclic epoxy group may mean a monovalent moiety derived from a compound containing an aliphatic hydrocarbon ring structure, wherein the two carbon atoms forming the aliphatic hydrocarbon ring also include an epoxy group. As the alicyclic epoxy group, an alicyclic epoxy group having 6 to 12 carbon atoms can be exemplified, for example, a 3,4-epoxycyclohexylethyl group or the like can be exemplified.

In the present application, the term "alkoxy group" may mean an alkoxy group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms, unless otherwise specified. The alkoxy group may be linear, branched or cyclic. In addition, the alkoxy group may be optionally substituted with one or more substituents.

In the present application, the term "alkyl group" may mean an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms, unless otherwise specified. The alkyl group may be linear, branched or cyclic. In addition, the alkyl group may be optionally substituted with one or more substituents.

In the present application, the term "monovalent hydrocarbon group" may refer to a compound consisting of carbon and hydrogen or a monovalent moiety derived from a derivative of such a compound, unless otherwise specified. For example, the monovalent hydrocarbon group may contain 1 to 25 carbon atoms. As a monovalent hydrocarbon group, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, etc. can be illustrated.

The term "alkenyl group" in the present application may mean an alkenyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified. The alkenyl group may be linear, branched, or cyclic, and may be optionally substituted with one or more substituents.

In the present application, the term "alkynyl group" may mean an alkynyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified. The alkynyl group may be linear, branched, or cyclic, and may be optionally substituted with one or more substituents.

The term "aryl group" in the present application may refer to a monovalent moiety derived from a compound or a derivative thereof including a structure in which a benzene ring or a structure in which two or more benzene rings are condensed or bonded, unless otherwise specified. The range of the aryl group may include a functional group commonly referred to as an aryl group as well as a so-called aralkyl group or an arylalkyl group. The aryl group may be, for example, an aryl group having 6 to 25 carbon atoms, 6 to 21 carbon atoms, 6 to 18 carbon atoms, or 6 to 12 carbon atoms. Examples of the aryl group include phenyl group, phenoxy group, phenoxyphenyl group, phenoxybenzyl group, dichlorophenyl, chlorophenyl, phenylethyl group, phenylpropyl group, benzyl group, tolyl group, xylyl group or naphthyl group. Can be.

As the substituent which may be optionally substituted in the alkoxy group, alkylene group, epoxy group or monovalent hydrocarbon group in the present application, halogen, glycidyl group, epoxyalkyl group, glycidoxyalkyl group or alicyclic epoxy group such as chlorine or fluorine, etc. Epoxy group, acryloyl group, methacryloyl group, isocyanate group, thiol group or monovalent hydrocarbon group and the like can be exemplified, but is not limited thereto.

M and n in the formulas (1), (2) and (4) are any numbers, for example, each independently may be a number in the range of 1 to 20, 1 to 16, or 1 to 12.

As said nitrogen-containing radically polymerizable compound, For example, an amide group containing radically polymerizable compound, an amino group containing radically polymerizable compound, an imide group containing radically polymerizable compound, a cyano group containing radically polymerizable compound, etc. Can be used. As said amide group-containing radically polymerizable compound, it is (meth) acrylamide or N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N-isopropyl (meth), for example. Acrylamide, N-methylol (meth) acrylamide, diacetone (meth) acrylamide, N-vinylacetoamide, N, N'-methylenebis (meth) acrylamide, N, N-dimethylaminopropyl (meth) ) Acrylamide, N, N-dimethylaminopropylmethacrylamide, N-vinylpyrrolidone, N-vinylcaprolactam or (meth) acryloyl morpholine and the like can be exemplified, and examples of the amino group-containing radically polymerizable compound include , Aminoethyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylate, and the like can be exemplified, and examples of the imide group-containing radically polymerizable compound , N-isopropylmaleimide, N- Iclohexyl maleimide or itaciconimide etc. can be illustrated, As a cyano group containing radically polymerizable compound, Acrylonitrile or methacrylonitrile etc. can be illustrated, but it is not limited to this. .

In addition, as the radically polymerizable compound including a salt site, as a salt of acrylic acid or methacrylic acid, for example, a salt of the above-described alkali metals including lithium, sodium, and potassium, or Salts with alkaline earth metals, including magnesium, calcium, strontium and barium, and the like can be exemplified, but are not limited thereto.

The matrix containing the above-mentioned polymer unit can be formed by polymerizing a hydrophilic polymerizable composition containing a hydrophilic polymerizable compound, for example, a radical polymerizable compound and a radical initiator, for example. Thus, the matrix may be a polymer of the hydrophilic polymerizable composition.

The kind of hydrophilic radically polymerizable compound is not particularly limited, and for example, the compounds described above can be used.

The kind of radical initiator contained in a hydrophilic polymerizable composition is not specifically limited. As the initiator, a radical thermal initiator or a photoinitiator capable of generating a radical capable of initiating a polymerization reaction by application of heat or irradiation of light can be used.

As the thermal initiator, for example, 2,2-azobis-2,4-dimethylvaleronitrile (V-65, Wako), 2,2-azobisisobutyronitrile (V-60, Azo initiators such as Wako (manufactured) or 2,2-azobis-2-methylbutyronitrile (V-59, made by Wako); Dipropyl peroxydicarbonate (Peroyl NPP, NOF (manufactured)), Diisopropyl peroxy dicarbonate (Peroyl IPP, NOF (manufactured)), Bis-4-butylcyclohexyl peroxy dicarbonate (Peroyl TCP, NOF (manufactured) )), Diethoxyethyl peroxy dicarbonate (Peroyl EEP, NOF (product)), diethoxyhexyl peroxy dicarbonate (Peroyl OPP, NOF agent), hexyl peroxy dicarbonate (Perhexyl ND, NOF agent) ), Dimethoxybutyl peroxy dicarbonate (Peroyl MBP, NOF (product)), bis (3-methoxy-3-methoxybutyl) peroxy dicarbonate (Peroyl SOP, NOF agent), hexyl peroxy pival Rate (Perhexyl PV, NOF), amyl peroxy pivalate (Luperox 546M75, Atofina), butyl peroxy pivalate (Perbutyl, NOF) or trimethylhexanoyl peroxide (Peroyl 355, NOF) Peroxy ester compounds such as (agent); Dimethyl hydroxybutyl peroxane neodecanoate (Luperox 610M75, Atofina), amyl peroxy neodecanoate (Luperox 546M75, Atofina) or butyl peroxy neodecanoate (Luperox 10M75, Atofina) Peroxy dicarbonate compounds such as; Acyl peroxides such as 3,5,5-trimethylhexanoyl peroxide, lauryl peroxide or dibenzoyl peroxide; Ketone peroxide; Dialkyl peroxides; Peroxy ketal; Alternatively, one or more kinds of peroxide initiators such as hydroperoxide and the like may be used. As the photoinitiator, a benzoin-based, hydroxy-ketone-based, amino-ketone-based or phosphine oxide-based photoinitiator may be used. Benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylanino acetophenone, 2,2-dimethoxy- 2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropane-1one, 1-hydroxycyclohexylphenylketone, 2-methyl-1 -[4- (methylthio) phenyl] -2-morpholino-propan-1-one, 4- (2-hydroxyethoxy) phenyl-2- (hydroxy-2-propyl) ketone, benzophenone, p -Phenylbenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-t-butylanthraquinone , 2-aminoanthraquinone, 2-methyl thioxanthone, 2-ethyl thioxanthone, 2-chloro thioxanthone, 2,4-dimethyl thioxanthone, 2,4-diethyl thioxanthone, benzyl dimethyl ketal, aceto Phenone dimethylketal, p-dimethylamino benzoic acid ester, oligo [2-hydroxy-2-methyl-1- [4- (1-methylvinyl) phenyl] propanone] and 2,4,6-trimethylbenzoyl-diphenyl Phosphine oxide or the like may be used, but is not limited thereto.

The initiator may be selected to use a high solubility in the hydrophilic component, for example, a hydroxy ketone compound, a water dispersion hydroxy ketone compound or an amino ketone compound or a water dispersion amino ketone compound may be used, but is limited thereto. It doesn't happen.

The hydrophilic polymerizable composition may include, for example, a radical initiator at a concentration of about 0.1 wt% to about 10 wt%. Such a ratio can be changed in consideration of, for example, physical properties of the film, polymerization efficiency and the like.

For example, in consideration of filming properties, if necessary, the hydrophilic polymerizable composition may further include a crosslinking agent. As a crosslinking agent, the compound which has two or more radically polymerizable groups can be used, for example.

As a compound which can be used as a crosslinking agent, polyfunctional acrylate can be illustrated. The multifunctional acrylate may mean a compound including two or more acryloyl groups or methacryloyl groups.

Examples of the polyfunctional acrylate include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and polyethylene glycol di ( Meta) acrylate, neopentylglycol adipate di (meth) acrylate, hydroxyl puivalic acid neopentylglycol di (meth) acrylate, dicyclopentanyl di (meth) Acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified di (meth) acrylate, di (meth) acryloxy ethyl isocyanurate, allylated cyclohexyl di (meth) ) Acrylate, tricyclodecane dimethanol (meth) acrylate, dimethylol dicyclopentane di (meth) acrylate, ethylene oxide modified hexahydrophthalic acid di (meth) acrylate, tricyclo Candimethanol (meth) acrylate, neopentylglycol modified trimethylpropane di (meth) acrylate, adamantane di (meth) acrylate or 9,9-bis [4- (2-acryloyloxy Difunctional acrylates such as ethoxy) phenyl] fluorene and the like; Trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, propylene oxide Trifunctional acrylates such as modified trimethylolpropane tri (meth) acrylate, trifunctional urethane (meth) acrylate or tris (meth) acryloxyethyl isocyanurate; Tetrafunctional acrylates such as diglycerin tetra (meth) acrylate or pentaerythritol tetra (meth) acrylate; 5-functional acrylates, such as propionic acid modified dipentaerythritol penta (meth) acrylate; And dipentaerythritol hexa (meth) acrylate, caprolactone modified dipentaerythritol hexa (meth) acrylate or urethane (meth) acrylate (ex. Isocyanate monomers and trimethylolpropane tri (meth) acrylate 6-functional acrylates, such as a reactant, etc. Moreover, as a polyfunctional acrylate, it is a compound called what is called photocurable oligomer in the industry, urethane acrylate, epoxy acrylate, polyester acrylate, or polyether. Acrylate etc. can also be used An appropriate kind can be selected from the above-mentioned compounds, and can be used, selecting one or more types.

As the crosslinking agent, a component capable of implementing a crosslinking structure by a radical reaction such as the polyfunctional acrylate, as well as, if necessary, crosslinking by a thermosetting reaction such as a known isocyanate crosslinking agent, epoxy crosslinking agent, aziridine crosslinking agent or metal chelate crosslinking agent Components that can implement the structure can also be used.

The crosslinking agent may be included, for example, in a hydrophilic polymerizable composition at a concentration of up to 50 wt% or from 10 wt% to 50 wt%. The ratio of the crosslinking agent may be changed in consideration of, for example, the physical properties of the film.

The hydrophilic polymerizable composition may further include other necessary components in addition to the components described above. In addition, the method of forming a 1st area | region using a hydrophilic polymeric composition is mentioned later.

The emulsion region can also be formed by polymerizing a polymerizable compound, for example, a radical polymerizable compound. For example, an emulsion region can be formed by superposing | polymerizing the said hydrophobic radically polymerizable compound.

In one example, the emulsion region may include a polymer unit of a compound represented by one of Chemical Formulas 5 to 7 below.

[Formula 5]

In Formula 5, Q is hydrogen or an alkyl group, and B is a straight or branched chain alkyl group having 5 or more carbon atoms or an alicyclic hydrocarbon group.

[Formula 6]

In Formula 6, Q is hydrogen or an alkyl group, and U is an alkylene, alkenylene or alkynylene or arylene group.

[Formula 7]

In formula (7), Q is hydrogen or alkyl group, U is alkylene group, Y is carbon atom, oxygen atom or sulfur atom, X is oxygen atom, sulfur atom or alkylene group, Ar is aryl group, n is any It is a number.

In the present application, the term alkenylene group or alkynylene group is an alkenylene group or alkynylene having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified. Can mean a group. The alkenylene group or alkynylene group may be linear, branched or cyclic. In addition, the alkenylene group or alkynylene group may be optionally substituted with one or more substituents.

The term "arylene group" in the present application may refer to a divalent moiety derived from a compound or a derivative thereof including a structure in which benzene or two or more benzenes are condensed or bonded, unless otherwise specified. The arylene group may have a structure containing, for example, benzene, naphthalene or fluorene.

In Formula 5, B may be a straight or branched chain alkyl group having 5 or more carbon atoms, 7 or more carbon atoms, or 9 or more carbon atoms. As such, a compound containing a relatively long chain alkyl group is known as a relatively nonpolar compound. The upper limit of the carbon number of the linear or branched alkyl group is not particularly limited. For example, the alkyl group may be an alkyl group having 20 or less carbon atoms.

In Formula 5, B may be, in another example, an alicyclic hydrocarbon group, for example, an alicyclic hydrocarbon group having 3 to 20 carbon atoms, 3 to 16 carbon atoms, or 6 to 12 carbon atoms, and examples of such hydrocarbon group include cyclohexyl group or iso Bornyl group and the like can be exemplified. Thus, the compound which has alicyclic hydrocarbon group is known as a relatively nonpolar compound.

N in the formula (7) is any number, for example, each independently may be a number in the range of 1 to 20, 1 to 16 or 1 to 12.

For example, the second region may be formed by polymerizing a hydrophobic polymerizable composition containing a hydrophobic radical polymerizable compound and a radical initiator. Thus, the second region may be a polymer of the hydrophobic polymerizable composition.

The kind of hydrophobic radically polymerizable compound contained in the hydrophobic polymerizable composition is not particularly limited, and a compound known in the art as a so-called nonpolar monomer can be used. For example, the compound described above may be used as the compound.

The kind of radical initiator contained in a hydrophobic polymerizable composition is not specifically limited. For example, an appropriate kind can be selected and used from the initiator described in the item of the hydrophilic polymeric compound mentioned above.

The hydrophobic polymerizable composition may include, for example, a radical initiator at a concentration of 5% by weight or less. Such concentration can be changed in consideration of, for example, physical properties of the film, polymerization efficiency, and the like.

In consideration of filming properties, if necessary, the hydrophobic polymerizable composition may further include a crosslinking agent. As the crosslinking agent, without particular limitation, for example, an appropriate component may be selected and used from the components described in the hydrophilic polymerizable composition section.

The crosslinking agent may be included, for example, in a hydrophobic polymerizable composition at a concentration of up to 50 wt%, or from 10 to 50 wt%. The concentration of the crosslinking agent may be changed in consideration of, for example, the physical properties of the film, the influence on other components included in the polymerizable compound, and the like.

The hydrophobic polymerizable composition may further include other components if necessary. In addition, the method of forming an emulsion region using the said hydrophobic polymerizable composition is mentioned later.

The light emitting layer may include other components in addition to the above components. Examples of the other components include, but are not limited to, known surfactants, amphiphilic nanoparticles, antioxidants, or scattering particles described below.

The emissive layer may comprise amphipathic nanoparticles, which may be present, for example, in one or more of the matrix or emulsion regions, and may suitably be at the boundaries of the matrix and emulsion regions. Amphiphilic nanoparticles can enhance the stability of the matrix and emulsion regions that are phase separated in the light emitting layer.

In one example, the amphipathic nanoparticles may include a core part including the nanoparticles and a cell part including an amphiphilic compound surrounding the nanoparticles. Amphiphilic compounds are compounds containing both hydrophilic and hydrophobic moieties at the same time, and some compounds are known in the art as so-called surfactants. For example, when the nanoparticles of the core portion are hydrophobic, the hydrophilic portion of the amphiphilic nanoparticles of the cell portion may face the core, and the hydrophobic portion may be disposed to the outside to form amphipathic nanoparticles as a whole. When the nanoparticles are hydrophilic, a minority portion of the amphiphilic nanoparticles of the cell portion may face the core, and the hydrophilic portion may be disposed outside to form amphipathic nanoparticles as a whole. In the above, the nanoparticles of the core portion may have, for example, an average particle diameter in the range of about 10 nm to 1000 nm, but this is not particularly limited as may be changed according to the purpose. As nanoparticles of the core portion, for example, metal particles such as gold, silver, copper, platinum, palladium, nickel, manganese or zinc, SiO ₂ , Al ₂ O ₃ , TiO ₂ , ZnO, NiO, CuO, MnO ₂ Oxide particles such as MgO, SrO or CaO or particles made of a polymer such as PMMA (polymethacrylate) or PS (polystyrene) may be used.

As the amphipathic compound of the cell portion, Triton X-114 (CAS No .: 9036-19-5), Triton X-100 (CAS No.:92046-34-9), Brij-58 (CAS No. : 9004-95-9), octyl glucoside (CAS No .: 29836-26-8), octylthio glucoside (CAS No .: 85618-21-9), decaethylene glycol monodecyl ether ( decaethylene glycol monododecyl ether, CAS No .: 9002-92-0), N-decanoyl-N-methylglucamine, CAS No .: 85261-20-7, decyl maltopyrano Decyl maltopyranoside (CAS No .: 82494-09-5), N-dodecyl maltoside (CAS No .: 69227-93-6), nonnaethylene glycol monododecyl ether , CAS No .: 3055-99-0), N-nonanoyl-N-methylglucamine, CAS No .: 85261-19-4), octaethylene glycol monododecyl ether (octaethylene glycol monododecyl ether, CAS No .: 3055-98-9), Span20, CAS No .: 1338-39-2, polyvinylpyrrole Money (polyvinylpyrrolidone, CAS No .: 9003-39-8) or Synperonic F108 (PEO-b-PPO-b-PEO, CAS No .: 9003-11-06), etc. can be used, but are not limited thereto.

Amphiphilic nanoparticles may include the amphiphilic compound in a range capable of securing the stability of the matrix and the emulsion region. For example, the ratio of the amphiphilic compound in the amphipathic nanoparticles may be about 5% to 30% by weight, but the range may be changed as long as the stability between the matrix and the emulsion region can be properly secured.

The method of including the amphiphilic nanoparticles in the light emitting layer, for example, the method of placing the amphiphilic nanoparticles at the boundary between the matrix and the emulsion region is not particularly limited. The method of compounding the particles can be used.

In one example, the amphiphilic nanoparticles may have a refractive index different from that of the matrix and emulsion regions. When such amphiphilic nanoparticles are located at the boundary between the matrix and the emulsion region, for example, white light may be more efficiently generated by scattering or diffusing light by the nanoparticles.

The degree of difference in the refractive index of the nanoparticles and the matrix and the emulsion region in the above may be set in an appropriate range in consideration of the scattering or diffusing effect of the desired light, the specific range is not particularly limited. For example, the absolute value of the difference in refractive index between the nanoparticles and the matrix and the absolute value of the difference in refractive index between the nanoparticles and the emulsion region may be in the range of 0.05 to 0.5, respectively. The refractive index of the nanoparticles is not particularly limited as long as it satisfies the above range, and may be, for example, in the range of 1.0 to 2.0. As used herein, the term refractive index is a value measured for light having a wavelength of about 550 nm, unless otherwise specified.

The proportion of the amphiphilic nanoparticles in the light emitting layer can be selected in consideration of the stability of the matrix and the emulsion region, for example. In one example, the amphiphilic nanoparticles may be present in a concentration of 1% by weight to 10% by weight based on the total weight of the matrix and the emulsion region or the light emitting layer.

Amphiphilic nanoparticles are those sold under the product name MX 80H by Soken, XX-43BQ, XX-128BQ, XX-130 BQ, XX-50 BQ, XX-131 BQ, MBX-2H, and MBX from Sekisui. MIBK-SD-L, MIBK-SD, MIBK sold by Nissan under the product names such as -30, SSX-104, XXS-105, SSX-108, SSX-110, XX-129BQ or XX-99BQ. What is marketed under product names, such as -ST-L, MIBK-ST, or TOL-ST, can also be applied.

The luminescent layer may also comprise an antioxidant, which component may be particularly useful when applying quantum dots as the luminescent nanoparticles. The quantum dot is deteriorated when exposed to oxygen, and has a property of lowering luminescence ability. In this case, if the above-described antioxidant is included in the light emitting layer, the light emitting nanoparticles may be protected. As the antioxidant, for example, oxidizing metals, phenolic antioxidants, thioether antioxidants, phosphate antioxidants or amine antioxidants such as hindered amines may be used. The antioxidant may be contained in any of the aforementioned matrix or emulsion regions.

Accordingly, the light emitting layer may include an oxidative metal particle or an oxide of the metal particle. An oxidizing metal particle means a metal capable of reacting with oxygen to form an oxide, and an alkali metal, an alkaline earth metal, a transition metal, or the like may also be applied when oxidative. The metal may protect the light emitting nanoparticles by reacting with oxygen in the light emitting layer to form an oxide. The oxidizing metal which can be used is not particularly limited as long as it can react with oxygen to form an oxide. Examples of the oxidizing metal include, but are not limited to, Pt, Au, Ag, or Ce. The size of the metal particles can be adjusted in consideration of the reactivity with oxygen, and can generally have an average particle diameter in the range of about 10 nm to 10,000 nm.

The ratio of the oxidizing metal particles or oxides thereof in the light emitting layer may be selected in consideration of, for example, reactivity with oxygen, curability of the light emitting layer material, or light emission characteristics of the light emitting layer. In one example, the oxidizing metal particles may be present in a ratio of about 0.01% to 1% by weight in the light emitting layer. If necessary, known dispersants for the dispersion of the oxidizing metal particles can be used together.

The light emitting layer may also include, as antioxidants, amine antioxidants such as phenolic antioxidants, thioether antioxidants, phosphate antioxidants or hindered amines. The specific kind of each antioxidant is not particularly limited, and known materials may be applied.

The ratio of the antioxidant in the light emitting layer may also be selected in consideration of the reactivity with oxygen, the curability of the light emitting layer material, or the light emitting properties of the light emitting layer. In one example, the antioxidant may be present in a ratio of about 0.01% to 1% by weight in the light emitting layer.

The light emitting layer may also contain scattering particles. The scattering particles included in the light emitting layer may further improve the optical characteristics of the light emitting layer by controlling the probability that light incident on the light emitting layer is introduced into the light emitting nanoparticles. As used herein, the term scattering particle means any kind of particle that has a different refractive index than the surrounding medium, for example the matrix or emulsion region, and also has a suitable size to scatter, refract or diffuse incident light. can do. For example, the scattering particles may have a low or high refractive index compared to the surrounding medium, for example the matrix and / or emulsion region, and the absolute value of the difference in the refractive index with the matrix and / or emulsion region is 0.2 or more. Or 0.4 or more particles. The upper limit of the absolute value of the difference in refractive index is not particularly limited and may be, for example, about 0.8 or less or about 0.7 or less. The scattering particles have, for example, an average particle diameter of 10 nm or more, 100 nm or more, more than 100 nm, 100 nm to 20000 nm, 100 nm to 15000 nm, 100 nm to 10000 nm, 100 nm to 5000 nm, 100 nm to 1000 nm or 100 nm to 500 nm. The scattering particles may have a shape such as spherical, elliptical, polyhedron or amorphous, but the shape is not particularly limited. As the scattering particles, for example, organic materials such as polystyrene or derivatives thereof, acrylic resins or derivatives thereof, silicone resins or derivatives thereof, or novolak resins or derivatives thereof, or silica, alumina, titanium oxide or zirconium oxide Particles comprising an inorganic material can be exemplified. The scattering particles may be formed of only one of the above materials or two or more of the above materials. For example, hollow particles such as hollow silica or core / cell structure particles may be used as scattering particles. The ratio of the scattering particles in the light emitting layer is not particularly limited and, for example, may be selected at an appropriate ratio in consideration of the path of light incident on the light emitting layer.

Scattering particles can be included, for example, in the matrix or emulsion region. In one example, the scattering particles may be included in only one of the matrix and emulsion regions and may not be present in the other regions. In the above, the region in which the scattering particles do not exist is a region substantially free of the particles as described above, and based on the total weight of the region, the weight ratio of the scattering particles in the region is 10% or less, 8 It may mean a case of% or less, 6% or less, 4% or less, 2% or less, 1% or less, or 0.5% or less. In one example, when the light emitting nanoparticles are included in only one of the matrix and emulsion regions, the scattering particles may be present only in the region where the light emitting nanoparticles are not included.

Scattering particles, for example, may be included in the light emitting layer in a ratio of 10 to 100 parts by weight relative to 100 parts by weight of the total weight of the matrix or emulsion region, it is possible to ensure appropriate scattering properties within this ratio.

The light emitting layer may further include additives such as oxygen scavenger or radical scavenger in the required amount.

The thickness of the light emitting layer is not particularly limited and may be selected in an appropriate range in consideration of the intended use and optical characteristics. In one example, the light emitting layer may have a thickness in the range of 10 to 500 μm, 10 to 400 μm, 10 to 300 μm, or 10 to 200 μm, but is not limited thereto.

Such a light emitting layer can be produced by polymerizing a layer containing a mixture of a hydrophilic polymerizable composition and a hydrophobic polymerizable composition, for example. As the hydrophilic and hydrophobic polymerizable composition, for example, the above-described composition, that is, a composition containing a hydrophilic or hydrophobic radically polymerizable compound, an initiator and the like can be used. In addition, the mixture may be prepared by separately preparing each of the hydrophilic and hydrophobic polymerizable compositions, or may be prepared by mixing the components of the hydrophilic and hydrophobic polymerizable composition at once. When the mixture is polymerized, phase separation may occur during the polymerization process, and a light emitting layer having the above-described type may be formed. The manner of forming the layer comprising the mixture is not particularly limited. For example, the obtained mixture can be formed by coating onto a suitable substrate by a known coating method. The method of curing the layer formed in the above manner is not particularly limited, for example, applying an appropriate range of heat such that the initiator included in each composition can be activated, or applying electromagnetic waves such as ultraviolet rays. It can be done in a way that is applied.

The light emitting layer, for example, a light emitting layer including quantum dots as light emitting nanoparticles, is vulnerable to external factors such as moisture, moisture or oxygen. Therefore, when the light emitting layer is exposed to the external factor, the performance of the light emitting nanoparticles is reduced. When the cutting or cutting process is applied in the formation of the light emitting layer, the side surface of the light emitting layer serves as a penetration path of external factors such as oxygen.

Accordingly, the light emitting film of the present application has a structure including a blocking film present on the side of the light emitting layer. The barrier layer may be present on all sides of the light emitting layer. In addition, the blocking layer may be present on the top and / or bottom of the light emitting layer as well as the side of the light emitting layer. In one example, the light emitting layer may be sealed on the entire surface by the blocking film.

In the present application, the term barrier film may refer to any kind of layer that exhibits a water vapor transmission rate (WVTR) and / or an oxygen transmission rate (OTR) in an intended range.

For example, the barrier membrane has a water vapor transmission rate of 10 g / m ² / day or less, g / m ² / day or less, 8 g / m ² / day or less, 6 g / m at a temperature of 40 ° C. and a relative humidity of 90%. ² / day or less, 4 g / m ² / day or less, 2 g / m ² / day or less, 1 g / m ² / day or less, 0.5 g / m ² / day or less, 0.3 g / m ² / day or less It may mean a layer that is 0.1 g / m ² / day or less. Since the water vapor transmission rate means that the numerical value is low, the said layer shows the outstanding barrier property, the minimum of the said water vapor transmission rate is not specifically limited. In one example, the lower limit of the water vapor transmission rate is 0.001 g / m ² / day or more, 0.005 g / m ² / day or more, 0.01 g / m ² / day or more, 0.02 g / m ² / day or more, 0.03 g / m ^At least ² / day, at least 0.04 g / m ² / day, at least 0.05 g / m ² / day or at least 0.06 g / m ² / day. The moisture permeability can be measured by, for example, ISO 15106-3 or ASTM F-1249 standard.

On the other hand, the barrier membrane has an oxygen transmission rate (OTR) of 1 cc / m ² / day or less at any temperature within a range of 25 ° C. to 30 ° C. and any relative humidity within 70% to 80%. ² / day or less, 0.8 cc / m ² / day or less, 0.6 cc / m ² / day or less, 0.4 cc / m ² / day or less, 0.2 cc / m ² / day or less, 0.1 cc / m ² / day or less, 0.05 cc / m ² / day or less, 0.03 cc / m ² / day or less, or 0.01 cc / m ² / day or less. The lower the value of the oxygen permeability, the lower the value of the oxygen permeability is. The oxygen permeability was measured according to, for example, the ASTM D-3985 standard.

In the present application, the blocking film can be formed using a known material known to block external factors, in particular moisture or oxygen. For example, the barrier layer may include a metal, an oxide, a nitride, an oxynitride, a fluoride, a polysilazane or an oxygen absorbent.

As the metal, aluminum (Al) may be exemplified, and as the oxide, TiO ₂ , Ti ₃ O ₃ , Al ₂ O ₃ , MgO, SiO, SiO ₂ , GeO, NiO, CaO, BaO, Fe ₂ O _3, such as Y ₂ O _3, ZrO _2, Nb ₂ O ₃ and CeO there may be mentioned a metal oxide _2, and so on, nitrides include, may be made of a metal nitride such as SiN, oxynitride include, SiON of Examples of the metal oxynitride include metal fluorides such as MgF ₂ , LiF, AlF _3, and CaF ₂ , but are not limited thereto. The barrier film may be formed by applying the above material to an appropriate method, for example, a deposition method or a coating method.

In addition, the kind of oxygen absorbent is not particularly limited in the above, and compounds known to have an oxygen absorbing function may be used without limitation. For example, as the oxygen absorbent, a type that exhibits an oxygen absorption function through oxidation of unsaturated carbon or a type that exhibits an oxygen absorption function by photosensitive dye oxidation can be used. Examples of such oxygen absorbents include sulfite compounds, vitamin E, vitamin C, tocopherol, compounds including unsaturated double bonds, and the like. As the unsaturated double bond-containing compound in the above, for example, squalene (squalene), fatty acid (fatty acid) compound or polybutadiene and the like can be exemplified, such compounds, if necessary, an appropriate amount of transition metal catalyst or ultraviolet sensitizer (UV sensitizer) and the like. Therefore, the barrier layer including the oxygen absorbent may further include the transition metal catalyst and / or an ultraviolet sensitizer.

In one example, the barrier layer may include a barrier layer and an oxygen absorbent. In this case, the oxygen absorbent may be included in the barrier film or in an oxygen absorber film laminated with the barrier film.

In the case where the barrier film includes a barrier film and an oxygen absorbing film, the arrangement order in the light emitting film is not particularly limited. However, in order to secure proper performance, the oxygen absorbing film may be formed adjacent to the light emitting layer as compared with the barrier film. In addition, the blocking film may include at least one oxygen blocking film and at least one barrier film. For example, the blocking film may have a structure in which one oxygen absorbing film is present between two barrier films.

In the present application, the term barrier film may mean, for example, all kinds of layers exhibiting a water vapor transmission rate (WVTR) in the aforementioned range. In addition, when the barrier film is combined with an oxygen absorbent, even when the moisture permeability of the barrier film itself is high to some extent, excellent barrier performance can be exhibited.

The kind of barrier film of this application will not be restrict | limited especially if it shows the water vapor transmission rate of the above-mentioned range. Various barrier films formed using materials known to block external factors such as moisture are known in the art, and all of these known barrier films may be applied in the present application.

For example, the barrier film may include a material (hereinafter, a barrier material) capable of exhibiting barrier properties, such as a metal, an oxide, a nitride, an oxynitride, or a fluoride. Specific types of the metal, oxide, nitride, oxynitride or fluoride are as described above. The barrier layer may include only the barrier material alone or may include other materials with the barrier material. As the material that may be included in the barrier film together with the barrier material, a matrix resin capable of holding the barrier material may be mentioned. In general, the barrier film can be prepared by forming a film of the barrier material on a suitable base film. The barrier material film is generally formed by, for example, a deposition method. However, the barrier film may be formed by coating a coating liquid containing the barrier material and the matrix resin in addition to the deposition method.

Examples of the base film applied to the barrier film having the above structure include a polyolefin film such as a polyethylene film or a polypropylene film, a cycloolefin polymer (COP) film such as a polynorbornene film, and a polycarbonate (PC) film. Or cellulose such as polyester film such as PET (poly (ethylene terephthalate)) film, polyvinyl chloride film, polyacrylonitrile film, polysulfone film, polyacrylate film, polyvinyl alcohol film or TAC (Triacetyl cellulose) film Although an ester polymer film or the copolymer film of 2 or more types of monomers among the monomer which forms the said polymer etc. can be illustrated, it is not limited to this.

When the barrier film has a structure including the base film and the layer of the barrier material present on the surface as described above, when the barrier film is formed on the side, top and / or bottom of the light emitting layer, the layer of the barrier material is compared with the base film. It may be disposed close to the light emitting layer.

The shape of the barrier material is not particularly limited and may be adjusted to exhibit appropriate barrier properties. For example, the barrier material may be plate-like, such as nanoclay, but is not limited thereto. The barrier film may also be formed using a material that can be converted into an oxide through a suitable treatment, such as polysilazane, or a plate material such as nanoclay, in which case the material may be formed in addition to the deposition method. It can also be formed by coating the coating liquid dispersed in the matrix resin.

The thickness of the barrier film as described above is not particularly limited and may be adjusted in consideration of desired barrier performance. For example, the thickness of the barrier film may be about 100 μm or less, 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, 50 μm or less, 40 μm or less, 30 μm or less, 20 μm or less, or 15 μm or less. have. The lower limit of the thickness of the barrier film is not particularly limited, and for example, the thickness may be about 5 μm or more. In the above, the thickness of the barrier film is, for example, when the barrier film is formed into a multi-layer structure including other layers such as a protective coating layer or a base film, for example, a layer exhibiting barrier property (ex. Metal, oxide, nitride, oxynitride or Thickness of the other element, for example, a protective coating layer, a base film, or the like, means a thickness which is not included.

The barrier layer may include the barrier layer alone, or may include an oxygen absorbent together with the barrier layer. The oxygen absorber may be included in the barrier film or may be laminated on one surface of the barrier film in the form of a separate layer. In the present application, the layer including the oxygen absorbent may be referred to as an oxygen absorber. Specific types of oxygen absorbers that can be used in the present application are as described above.

In order to include the oxygen absorbent in the barrier film, the oxygen absorbent may be deposited together in the above-described deposition process of the barrier material, the barrier material may be deposited on the surface where the oxygen absorber is present, or the barrier material may be included. A method of forming a barrier film by dispersing the oxygen absorbent together in the coated liquid can be used.

When the oxygen absorber is included in the oxygen absorbing film, the oxygen absorbing film is formed by a coating method using a coating liquid prepared by dispersing the oxygen absorbent in an appropriate resin matrix, or the raw material containing the resin matrix and the oxygen absorbing agent is extruded. After forming an oxygen absorbing film by applying a film forming method to the film forming method, the oxygen absorbing film may be laminated with the barrier film, or the oxygen absorbing film may be directly coated or extruded on the barrier film. It can be applied in a manner to form.

The oxygen absorbing film formed in this manner may further include a resin component derived from the resin matrix. The resin component that can be included in the oxygen absorbing film is not particularly limited, and for example, a component capable of effectively holding an oxygen absorbent and maintaining optical transparency can be used. As such a resin component, polyester, polyacrylate, polyolefin, polycarbonate, polyimide, or the like can be used.

If necessary, in the oxygen absorbing film including the resin component and the oxygen absorbent, the refractive index of each component may be adjusted to allow the oxygen absorbing film to exhibit a scattering function. For example, the absolute value of the difference between the refractive index of the oxygen absorber included in the oxygen absorbing film and the refractive index of the resin component may be about 0.01 or more. Due to the difference in refractive index within this range, the oxygen absorbing film exhibits an appropriate haze, thereby ensuring a scattering function. In the present application, the refractive index may refer to a refractive index measured for light having a wavelength of about 550 nm, unless specifically stated otherwise.

The ratio of the oxygen absorbent in the oxygen absorbing film or the barrier film is not particularly limited. The ratio of the oxygen absorbent in the oxygen absorber may be adjusted in consideration of the kind of oxygen absorber used, the thickness of the oxygen absorber, the kind of other components included with the oxygen absorbent, such as a resin component, and the like.

For example, the ratio of the oxygen absorbent in the oxygen absorbing film or the barrier film may be adjusted so that the absorbing film or the barrier film can exhibit the oxygen transmission rate (OTR) in the above-described range.

For example, the oxygen absorbent in the oxygen absorbing film may generally include 2 to 400 parts by weight of the oxygen absorbent relative to 100 parts by weight of the resin component. The ratio is exemplary, and the ratio may be changed in consideration of the type of the oxygen absorbent or the desired performance.

The thickness of the oxygen absorbing film is not particularly limited, and may be adjusted to exhibit the oxygen permeability in the above range depending on the material of the oxygen absorbing film.

In one example, the barrier layer may have a reflectance of at least one wavelength within the range of 400 nm to 760 nm or the entire wavelength of at least 80%, at least 85%, at least 90%, or at least 95%. The reflectance is appropriate as the numerical value is higher, and the upper limit is not particularly limited. For example, the reflectance may be 100% or less. By adjusting the reflectance of the blocking film, the light incident to the inside of the light emitting film can be properly reflected in the inside of the film, thereby improving the luminous efficiency by the light emitting film.

1 is a cross-sectional view of an exemplary light emitting film, and shows a structure in which a blocking film 102 exists on a side surface of the light emitting layer 101, and a blocking film exists on upper and lower portions of the light emitting layer 101. The blocking film present on the upper and lower portions of the light emitting layer 101 is a structure including a layer 1031 of a barrier material and a base film 1032.

If necessary, the refractive index of each element included in the above structure can be adjusted. By adjusting the refractive index as described above, the light incident to the inside of the light emitting film can be properly reflected in the inside of the film, thereby improving the light emission efficiency by the light emitting film.

The light emitting film may include, as an additional layer, a reflective layer on top of the light emitting layer, for example. The reflective layer may be included, for example, in the case where the light emitting film includes the blocking film or between the light emitting layer and the blocking film. As the reflective layer, for example, a reflective layer in which the wavelength of the reflected light is within the range of 420 nm to 490 nm can be used. The wavelength of the reflected light in the above means the wavelength of the light that the reflective layer can reflect. For example, when the light emitting layer contains an appropriate amount of the green particles and the red particles described above, the light emitting layer converts at least some of the incident blue light, that is, light within the wavelength range of 420 nm to 490 nm, into green light and red light, and finally white light is emitted. It can be configured to be released. In this case, by introducing a reflective layer capable of reflecting blue light, it is possible to adjust the probability that the incident blue light meets the green particles or the red particles, thereby enabling the generation of the white light more efficiently.

As a reflection layer, a well-known layer can be used as long as it has the wavelength of the reflected light mentioned above. Examples of the reflective layer include, but are not limited to, a cholesteric liquid crystal layer or a lyotropic liquid crystal layer.

The light emitting film may also comprise, as an additional layer, for example an optically anisotropic layer on top of the reflective layer. The optically anisotropic layer may serve to adjust color characteristics of light generated from the light emitting film, for example, color coordinates.

In one example, the optically anisotropic layer may have a plane retardation for light of 550 nm wavelength in a range of 100 nm to 350 nm. In the above, the plane phase difference is a numerical value calculated by the following Equation 1.

[Equation 1]

Rin = d × (Nx-Ny)

In Equation 1, Rin is the retardation of plane, d is the thickness of the optically anisotropic layer, Nx is the refractive index for the light of 550 nm wavelength in the slow axis direction of the optically anisotropic layer, Ny is 550 nm in the fast axis direction of the optically anisotropic layer Refractive index for light of wavelength.

The optically anisotropic layer may have a half wavelength or a quarter wavelength phase retardation characteristic. As used herein, the term "n-wavelength phase retardation characteristic" may mean a characteristic capable of retarding incident light by n times the wavelength of the incident light within at least a portion of the wavelength range. For example, when the optically anisotropic layer has a 1/2 phase retardation property, the planar phase difference for light having a wavelength of 550 nm may be in a range of 200 nm to 290 nm or 220 nm to 270 nm, and the anisotropic layer In the case of having this quarter phase retardation property, the plane retardation with respect to the light of the 550 nm wavelength may be in the range of 110 nm to 220 nm or 140 nm to 170 nm.

The optically anisotropic layer may be a polymer film, for example, a stretched polymer film or a liquid crystal film. As said polymer film, the film which extended | stretched the light transmissive polymer film which can provide optical anisotropy by extending | stretching by an appropriate method can be used, for example. As long as it has optical anisotropy, an unstretched polymer film can also be used. Examples of the polymer film include polyolefin films such as polyethylene films or polypropylene films, cycloolefin polymer (COP) films such as polynorbornene films, polyvinyl chloride films, polyacrylonitrile films, polysulfone films, Cellulose ester-based polymer film, such as polyacrylate film, polyvinyl alcohol film or Triacetyl cellulose (TAC) film, or a copolymer film of two or more monomers among the monomers forming the polymer may be exemplified, but the present invention is not limited thereto. no. As the liquid crystal film, a film formed by orientating a reactive liquid crystal compound called RM (Reactive Mesogen) in an appropriate manner can be used. In this field, various kinds of polymer films or liquid crystal films expressing such a planar phase difference are known, and all of these films can be used in the present application.

The light emitting film may further include a polarizing layer. The polarizing layer may be present on the optically anisotropic layer. In this case, an angle formed between the light absorption axis of the polarizing layer and the optical axis (eg, the slow axis) of the optically anisotropic layer may be in a range of about 0 degrees to 90 degrees. By disposing the optically anisotropic layer and the polarizing layer in the above range, it is possible to adjust the color characteristics of the light emitted from the light emitting film.

As the polarizing layer, a known material can be used without particular limitation. The polarizing layer may be a functional element capable of extracting light vibrating in one direction from incident light vibrating in various directions. As such a polarizing layer, for example, a conventional polarizing layer such as a PVA (poly (vinyl alcohol)) polarizing layer is used, or a host containing a lyotropic liquid crystal layer (LLC layer) or a reactive liquid crystal compound and a dichroic dye. A polarizing coating layer, such as a guest liquid crystal layer, may be used, but is not limited thereto.

The light emitting film may further include other components in addition to the aforementioned components. As a layer which may be further included in the light emitting film, for example, various optical films including a brightness enhancement film, a prism sheet, or the like, which may be present on the optically anisotropic layer, or one or both surfaces of the light emitting layer, or a side surface thereof. Barrier films and the like that may be present in the back and the like can be exemplified, but is not limited thereto.

The present application also relates to a lighting device. An exemplary lighting device may include a light source and the light emitting film. In one example, the light source and the light emitting film in the lighting device may be arranged to allow light emitted from the light source to enter the light emitting film. The light emitting layer included in the light emitting film may be disposed in the lighting device closer to the CLC layer. When light irradiated from the light source is incident on the light emitting film, some of the incident light is emitted as it is not absorbed by the light emitting nanoparticles in the light emitting film, and the other part is absorbed by the light emitting nanoparticles, and then is converted into light having a different wavelength. Can be released. Accordingly, by adjusting the wavelength of the light emitted from the light source and the wavelength of the light emitted by the light emitting nanoparticles, it is possible to adjust the color purity or color of the light emitted from the light emitting film. In addition, in the present application, the blue light is reflected by the CLC layer on the upper part of the light emitting layer to be incident on the light emitting layer again, so that the light emitting efficiency of the light emitting layer can be further improved.

The kind of the light source included in the lighting device of the present application is not particularly limited, and an appropriate kind may be selected in consideration of the kind of the desired light. In one example, the light source may be a blue light source, for example, a light source capable of emitting light having a wavelength within a range of 420 to 490 nm.

2 and 3 are views showing an exemplary lighting device including a light source and a light emitting film as described above.

As shown in FIGS. 2 and 3, the light source and the light emitting film in the lighting apparatus may be arranged to allow light emitted from the light source to be incident on the light emitting film. In FIG. 2, the light source 401 is disposed under the light emitting film 402, so that light irradiated from the light source 401 in the upper direction may be incident to the light emitting film 402.

3 is a case where the light source 401 is disposed on the side surface of the light emitting film 402. Although not essential, when the light source 401 is disposed on the side surface of the light emitting film 402 as described above, the light from the light source 401, such as the light guiding plate 501 or the reflecting plate 502, is more likely to be used. Other means may be included to efficiently enter the luminescent film 402.

2 and 3 is an example of the lighting device of the present application, in addition to the lighting device may have a variety of known forms, for this purpose may further include a variety of known configurations.

The lighting device of the present application can be used for various purposes. A representative use of the lighting device of the present application is a display device. For example, the lighting device may be used as a backlight unit (BLU) of a display device such as a liquid crystal display (LCD).

In addition, the lighting device may be a backlight unit (BLU) of a display device such as a computer, a mobile phone, a smartphone, a personal digital assistant (PDA), a gaming device, an electronic reading device, or a digital camera, indoor or outdoor lighting. It may be used for stage lighting, decorative lighting, accent lighting, or museum lighting, and the like, but may also be used for horticulture, special wavelength lighting required in biology, and the like, but the use of the lighting apparatus is not limited thereto.

The present application can provide a light emitting film and its use, which can effectively produce a desired light, for example, white light, and whose performance can be stably maintained for a long time.

1 is a cross-sectional view of an exemplary light emitting film.

2 and 3 are schematic diagrams of exemplary lighting devices.

4 to 9 is a photograph of the light emitting film produced in the embodiment.

10 and 11 are photographs of the light emitting film prepared in Comparative Example 1.

It is a figure which shows the durability evaluation result of the light emitting film of an Example and a comparative example.

101: light emitting layer

102: blocking film

1031: layer of barrier material

1032: base film

401: light source

402 light emitting film

501 light guide plate

502: reflector

Hereinafter, the light emitting film and the like of the present application will be described in detail with reference to Examples and Comparative Examples, but the scope of the light emitting film and the like is not limited to the following Examples.

1. Measurement of reflectance

The reflectance of the barrier film was evaluated as follows. That is, after depositing the same material as the blocking film formed on the substrate (PET, poly (ethyleneterephtahlate)) in the same thickness and the same method, using the measurement equipment (F10-RT of Filmetrics) according to the manufacturer's manual Evaluated.

2. Evaluation of moisture permeability and oxygen permeability

The water vapor transmission rate (WVTR) mentioned in the Examples was measured according to ISO 15106-3 or ASTM F-1249 standard, and the oxygen transmission rate (OTR, Oxygen Transmission Rate) was measured according to ASTM D-3985 standard. .

3. Evaluation of durability

The durability of the light emitting film prepared in Example or Comparative Example is that after leaving the film in a dark state at a temperature of 80 ° C. for a predetermined time, the light is irradiated from one surface of the light emitting film, and the rate of change of the luminance of light emitted from the other surface is measured. Measured and evaluated. In the above, the luminance was evaluated using a measuring instrument (spectrometer, SR-UL2, Topcon).

Preparation Example 1 Preparation of Light-Emitting Layer (A)

PEG (poly (ethyleneglycol) diacrylate, CAS No .: 26570-48-9, solubility parameter (HSP): about 18 (cal / cm ³ ) ^1/2 ), LA (lauryl acrylate, CAS No .: 2156-97- 0, solubility parameter (HSP): about 8 (cal / cm ³ ) ^1/2 ), bisfluorene diacrylate (BD, bisfluorene diacrylate, CAS No .: 161182-73-6, solubility parameter (HSP): about 9 (cal / cm ³ ) ^1/2 ), green quantum dots (Quantum Dot, luminescent nanoparticles), surfactant (MX 80-H, manufactured by Soken), and SiO ₂ nanoparticles were prepared as 9: 1: 1: 0.2: 0.05: It was mixed at a weight ratio of 0.05 (PEGDA: LA: BD: green particles: surfactant: SiO ₂ nanoparticles). Subsequently, Irgacure2959 and Irgacure907 were mixed to have a concentration of about 1% by weight as a radical initiator, and stirred for about 6 hours to prepare Mixture A. Apart from the above, PEGDA (poly (ethyleneglycol) diacrylate, CAS No .: 26570-48-9, solubility parameter (HSP): about 18 (cal / cm ³ ) ^1/2 ), LA (lauryl acrylate, CAS No .: 2156 -97-0, solubility parameter (HSP): about 8 (cal / cm ³ ) ^1/2 ), bisfluorene diacrylate (BD, bisfluorene diacrylate, CAS No .: 161182-73-6, solubility parameter (HSP) ): About 9 (cal / cm ³ ) ^1/2 ), red quantum dots (Quantum Dot, light emitting nanoparticles), surfactant (MX 80-H, manufactured by Soken) and SiO ₂ nanoparticles are 9: 1: 1: 0.02 It was mixed in a weight ratio of: 0.05: 0.05 (PEGDA: LA: BD: red particles: surfactant: SiO ₂ nanoparticles). Subsequently, Irgacure2959 and Irgacure907 were mixed to have a concentration of about 1% by weight as a radical initiator, and stirred for about 6 hours to prepare Mixture B. Mixing A and B in the same weight ratio to prepare a coating solution, and the coating solution is placed in a thickness of about 100 ㎛ between two barrier films (i-component) spaced at regular intervals, and irradiated with ultraviolet rays Radical polymerization was induced to cure to form a light emitting layer. 4 and 5 are micrographs confirmed for the above examples. It can be seen from the figure that the emulsion region in which the light emitting nanoparticles are present is dispersed in the matrix to form a light emitting layer that is present by phase separation.

Preparation Example 2 Preparation of Light-Emitting Layer (B)

PEG (poly (ethyleneglycol) diacrylate, CAS No .: 26570-48-9, solubility parameter (HSP): about 18 (cal / cm ³ ) ^1/2 ), LA (lauryl acrylate, CAS No .: 2156-97- 0, solubility parameter (HSP): about 8 (cal / cm ³ ) ^1/2 ), bisfluorene diacrylate (BD, bisfluorene diacrylate, CAS No .: 161182-73-6, solubility parameter (HSP): about 9 (cal / cm ³ ) ^1/2 ), green particles (Quantum Dot particles), surfactants (MX 80-H, manufactured by Soken), and SiO ₂ nanoparticles as 9: 1: 1: 0.1: 0.05: 0.05 (PEGDA) : LA: BD: green particles: surfactant: SiO ₂ nanoparticles). Subsequently, Irgacure2959 and Irgacure907 were mixed to have a concentration of about 1% by weight as a radical initiator, and stirred for about 6 hours to prepare a mixture. The mixture was placed at a thickness of about 100 μm between two barrier films (i-component) spaced at regular intervals, and irradiated with ultraviolet rays to induce radical polymerization to form a light emitting layer. 6 is a photograph of a light emitting layer formed in the above manner. It can be seen from the figure that the emulsion region in which the light emitting nanoparticles are present is dispersed in the matrix to form a light emitting layer that is present by phase separation.

Example 1.

Aluminum was deposited on the side of the light emitting film (the light emitting film including the light emitting layer present between two barrier films (i-component)) prepared in Preparation Example 2 to form a blocking film. The deposition was performed at a temperature of about 110 ° C. and deposited to a thickness of about 200 nm. As a result of measuring the reflectance of the blocking film formed of aluminum, the reflectance was about 90% to 92% in the entire range of 400 to 780 nm. 7 to 9 are photographs of the prepared light emitting film, and in particular, FIGS. 8 and 9 are enlarged photographs of the sidewalls.

Comparative Example 1.

A light emitting film was manufactured in the same manner as in Example 1, except that no barrier film was formed on the side surfaces. 10 and 11 are photographs of the prepared light emitting film.

Test Example 1.

As a result of evaluating the durability of the light emitting films prepared in Example 1 and Comparative Example 1, in the case of Comparative Example 1, the luminance was rapidly decreased over time, the durability was not secured, but in the case of Example 1 for a long time It was confirmed that the luminance was stably secured.

Example 2.

Preparation of the barrier

As an oxygen absorber, the composition which mix | blended the appropriate amount of cobalt catalyst with the resin composition in which polybutadiene and polyethylene are mixed by the weight ratio (polybutadiene: polyethylene) of about 4: 1 was used. The composition was applied to an extrusion method to form a layer having a thickness of about 30 μm to prepare an oxygen absorbing film. The oxygen absorbing film was laminated with a known barrier film to prepare a blocking film. As a barrier film, a barrier film having an Al 2 O 3 deposition layer having a thickness of about 100 nm and a protective coating layer having a thickness of about 1 μm is formed on one surface of a poly (ethylene terephthalate) film (thickness: about 12 μm). (WVTR, Water Vapor Transmission Rate): about 0.08 g / m2 / day (40 ° C temperature and 90% relative humidity), Oxygen Transmission Rate (OTR): about 0.3 cc / m2 / day / atm ( 30 ° C. and 70% relative humidity)) (barrier film A). The barrier film was manufactured by stacking the prepared oxygen absorbing film on one surface of the barrier film A.

Preparation of Light Emitting Film

Forming a blocking film on the side of the light emitting layer prepared in Preparation Example 2 in the same manner as in Example 1, and again laminated on the upper and lower layers so that the oxygen absorbing film adjacent to the light emitting layer compared to the barrier film to the light emitting film Prepared.

Example 3.

A barrier film (WVTR, formed of a SiOx deposition layer having a thickness of about 100 nm and a protective coating layer having a thickness of about 1 μm on one surface of a poly (ethylene terephthalate) (PET) film (thickness: about 12 μm) Water Vapor Transmission Rate): about 0.08 g / m2 / day (40 ° C. temperature and 90% relative humidity), Oxygen Transmission Rate (OTR): about 0.1 cc / m 2 / day / atm (25 ° C. and A light emitting film was manufactured in the same manner as in Example 2, except that the barrier film was prepared by laminating the oxygen absorbing film prepared in Example 2 on the barrier film B using a relative humidity of 80%)) (barrier film B). Prepared.

Comparative Example 2.

A light emitting film was manufactured in the same manner as in Example 2, except that only the barrier film A of Example 2 was laminated on the upper and lower portions of the light emitting layer without the blocking film formed on the side surfaces thereof.

Comparative Example 3.

A light emitting film was manufactured in the same manner as in Example 2, except that only the barrier film B of Example 3 was laminated on the upper and lower portions of the light emitting layer without the blocking film formed on the side surfaces thereof.

Comparative Example 4.

A barrier film (WVTR, formed with a SiOx deposition layer having a thickness of about 100 nm and a protective coating layer having a thickness of about 1 μm on one surface of a poly (ethylene terephthalate) (PET) film (thickness: about 125 μm) Water Vapor Transmission Rate): about 0.021 g / m2 / day (38 ° C temperature and 90% relative humidity), Oxygen Transmission Rate (OTR): about 0.061 cc / m2 / day / atm (temperature 23 ° C) A light emitting film was manufactured in the same manner as in Comparative Example 2 except that only 0% relative humidity)) (barrier film C) was used.

Comparative Example 5.

A barrier film in which a mixed deposition layer of SiOx and ZnO having a thickness of about 100 nm and a protective coating layer having a thickness of about 1 μm are formed on one surface of a poly (ethylene terephthalate) (PET) film (thickness: about 50 μm) Water Vapor Transmission Rate (WVTR): about 0.019 to 0.036 g / m2 / day (38 ° C. temperature and 90% relative humidity), Oxygen Transmission Rate (OTR): about 0.042 cc / m2 / day / atm A light emitting film was manufactured in the same manner as in Comparative Example 2 except that only (Barrier film D) (temperature of 23 ° C. and relative humidity of 0%) was used.

Comparative Example 6.

A light emitting film was manufactured in the same manner as in Comparative Example 2, except that a barrier film prepared by stacking the oxygen absorbing layer prepared in Example 2 on one surface of a PET (poly (ethylene terephthalate)) film having no barrier property was used.

Test Example 2.

The durability evaluation results measured in the above manner for the light emitting films prepared in Examples and Comparative Examples are shown in FIG. 12. In the drawings, in the case of Comparative Examples 2 to 5 in which the side barrier film was not applied and only the barrier film was applied, the lower the moisture permeability of the barrier film was, the better the durability was, but in any case, satisfactory durability was not secured. The applied Comparative Example 6 also did not show excellent durability. On the contrary, in Examples 2 and 3 in which a barrier film having a high moisture permeability and a oxygen absorbing film were applied as compared with the barrier films of Comparative Examples 4 and 5, and the barrier films were formed on the side surfaces, the durability was stable for a long time. .

Claims

A light emitting layer comprising light emitting nanoparticles; And a blocking film on the side of the light emitting layer.
The light emitting film of claim 1, further comprising a blocking film positioned on an upper surface or a lower surface of the light emitting layer.
The light emitting film of claim 1, wherein the blocking film comprises a metal, an oxide, a nitride, an oxynitride, a fluoride, a polysilazane, or an oxygen absorbent.
The method of claim 1, wherein the blocking film is Al, TiO 2 , Ti 3 O 3 , Al 2 O 3 , MgO, SiO, SiO 2 , GeO, NiO, CaO, BaO, Fe 2 O 3 , Y 2 O 3 , ZrO 2 , Nb 2 O 3 , CeO 2 , SiN, SiON, MgF 2 , LiF, AlF 3 or CaF 2 .
The light emitting film of claim 3, wherein the oxygen absorbent is a sulfite compound, vitamin E, vitamin C, tocopherol, or a compound including an unsaturated double bond.
The light emitting film of Claim 5 whose unsaturated double bond containing compound is a squalene, a fatty acid compound, or a polybutadiene.
4. The light emitting film of claim 3, wherein the barrier film including the oxygen absorbent further comprises a transition metal catalyst or an ultraviolet sensitizer.
The light emitting film of claim 1, wherein the blocking film comprises a barrier film and an oxygen absorbent.
9. The light emitting film of claim 8, wherein the oxygen absorbent is contained in the barrier film or in the oxygen absorber film included in the barrier film together with the barrier film.
The light emitting film of claim 1, wherein the blocking film has a reflectance of 80% or more for any wavelength within a range of 400 nm to 760 nm.
The light emitting film according to claim 1, wherein the light emitting layer comprises a matrix in a continuous phase and an emulsion region dispersed in the matrix.
The light emitting film of claim 11, wherein the light emitting nanoparticles are included in an emulsion region.
13. The light emitting film of claim 12, wherein the proportion of the light emitting nanoparticles contained in the emulsion region is 90% by weight or more of all the light emitting nanoparticles contained in the light emitting layer.
The light emitting film of claim 1, wherein the light emitting nanoparticles are quantum dots.
An illuminating device comprising a light source and the light emitting film of claim 1, wherein the light source and the light emitting film are arranged to allow light from the light source to be incident on the light emitting film.
Display device comprising the lighting device of claim 15.